1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2013 Fusion IO. All rights reserved.
4 */
5
6#include <linux/types.h>
7#include "btrfs-tests.h"
8#include "../ctree.h"
9#include "../btrfs_inode.h"
10#include "../disk-io.h"
11#include "../extent_io.h"
12#include "../volumes.h"
13#include "../compression.h"
14#include "../accessors.h"
15
16static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
17 u64 ram_bytes, u64 offset, u64 disk_bytenr,
18 u64 disk_len, u32 type, u8 compression, int slot)
19{
20 struct btrfs_path path;
21 struct btrfs_file_extent_item *fi;
22 struct extent_buffer *leaf = root->node;
23 struct btrfs_key key;
24 u32 value_len = sizeof(struct btrfs_file_extent_item);
25
26 if (type == BTRFS_FILE_EXTENT_INLINE)
27 value_len += len;
28 memset(&path, 0, sizeof(path));
29
30 path.nodes[0] = leaf;
31 path.slots[0] = slot;
32
33 key.objectid = BTRFS_FIRST_FREE_OBJECTID;
34 key.type = BTRFS_EXTENT_DATA_KEY;
35 key.offset = start;
36
37 /*
38 * Passing a NULL trans handle is fine here, we have a dummy root eb
39 * and the tree is a single node (level 0).
40 */
41 btrfs_setup_item_for_insert(NULL, root, path: &path, key: &key, data_size: value_len);
42 fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
43 btrfs_set_file_extent_generation(eb: leaf, s: fi, val: 1);
44 btrfs_set_file_extent_type(eb: leaf, s: fi, val: type);
45 btrfs_set_file_extent_disk_bytenr(eb: leaf, s: fi, val: disk_bytenr);
46 btrfs_set_file_extent_disk_num_bytes(eb: leaf, s: fi, val: disk_len);
47 btrfs_set_file_extent_offset(eb: leaf, s: fi, val: offset);
48 btrfs_set_file_extent_num_bytes(eb: leaf, s: fi, val: len);
49 btrfs_set_file_extent_ram_bytes(eb: leaf, s: fi, val: ram_bytes);
50 btrfs_set_file_extent_compression(eb: leaf, s: fi, val: compression);
51 btrfs_set_file_extent_encryption(eb: leaf, s: fi, val: 0);
52 btrfs_set_file_extent_other_encoding(eb: leaf, s: fi, val: 0);
53}
54
55static void insert_inode_item_key(struct btrfs_root *root)
56{
57 struct btrfs_path path;
58 struct extent_buffer *leaf = root->node;
59 struct btrfs_key key;
60 u32 value_len = 0;
61
62 memset(&path, 0, sizeof(path));
63
64 path.nodes[0] = leaf;
65 path.slots[0] = 0;
66
67 key.objectid = BTRFS_INODE_ITEM_KEY;
68 key.type = BTRFS_INODE_ITEM_KEY;
69 key.offset = 0;
70
71 /*
72 * Passing a NULL trans handle is fine here, we have a dummy root eb
73 * and the tree is a single node (level 0).
74 */
75 btrfs_setup_item_for_insert(NULL, root, path: &path, key: &key, data_size: value_len);
76}
77
78/*
79 * Build the most complicated map of extents the earth has ever seen. We want
80 * this so we can test all of the corner cases of btrfs_get_extent. Here is a
81 * diagram of how the extents will look though this may not be possible we still
82 * want to make sure everything acts normally (the last number is not inclusive)
83 *
84 * [0 - 6][ 6 - 4096 ][ 4096 - 4100][4100 - 8195][8195 - 12291]
85 * [inline][hole but no extent][ hole ][ regular ][regular1 split]
86 *
87 * [12291 - 16387][16387 - 24579][24579 - 28675][ 28675 - 32771][32771 - 36867 ]
88 * [ hole ][regular1 split][ prealloc ][ prealloc1 ][prealloc1 written]
89 *
90 * [36867 - 45059][45059 - 53251][53251 - 57347][57347 - 61443][61443- 69635]
91 * [ prealloc1 ][ compressed ][ compressed1 ][ regular ][ compressed1]
92 *
93 * [69635-73731][ 73731 - 86019 ][86019-90115]
94 * [ regular ][ hole but no extent][ regular ]
95 */
96static void setup_file_extents(struct btrfs_root *root, u32 sectorsize)
97{
98 int slot = 0;
99 u64 disk_bytenr = SZ_1M;
100 u64 offset = 0;
101
102 /*
103 * Tree-checker has strict limits on inline extents that they can only
104 * exist at file offset 0, thus we can only have one inline file extent
105 * at most.
106 */
107 insert_extent(root, start: offset, len: 6, ram_bytes: 6, offset: 0, disk_bytenr: 0, disk_len: 0, type: BTRFS_FILE_EXTENT_INLINE, compression: 0,
108 slot);
109 slot++;
110 offset = sectorsize;
111
112 /* Now another hole */
113 insert_extent(root, start: offset, len: 4, ram_bytes: 4, offset: 0, disk_bytenr: 0, disk_len: 0, type: BTRFS_FILE_EXTENT_REG, compression: 0,
114 slot);
115 slot++;
116 offset += 4;
117
118 /* Now for a regular extent */
119 insert_extent(root, start: offset, len: sectorsize - 1, ram_bytes: sectorsize - 1, offset: 0,
120 disk_bytenr, disk_len: sectorsize - 1, type: BTRFS_FILE_EXTENT_REG, compression: 0, slot);
121 slot++;
122 disk_bytenr += sectorsize;
123 offset += sectorsize - 1;
124
125 /*
126 * Now for 3 extents that were split from a hole punch so we test
127 * offsets properly.
128 */
129 insert_extent(root, start: offset, len: sectorsize, ram_bytes: 4 * sectorsize, offset: 0, disk_bytenr,
130 disk_len: 4 * sectorsize, type: BTRFS_FILE_EXTENT_REG, compression: 0, slot);
131 slot++;
132 offset += sectorsize;
133 insert_extent(root, start: offset, len: sectorsize, ram_bytes: sectorsize, offset: 0, disk_bytenr: 0, disk_len: 0,
134 type: BTRFS_FILE_EXTENT_REG, compression: 0, slot);
135 slot++;
136 offset += sectorsize;
137 insert_extent(root, start: offset, len: 2 * sectorsize, ram_bytes: 4 * sectorsize,
138 offset: 2 * sectorsize, disk_bytenr, disk_len: 4 * sectorsize,
139 type: BTRFS_FILE_EXTENT_REG, compression: 0, slot);
140 slot++;
141 offset += 2 * sectorsize;
142 disk_bytenr += 4 * sectorsize;
143
144 /* Now for a unwritten prealloc extent */
145 insert_extent(root, start: offset, len: sectorsize, ram_bytes: sectorsize, offset: 0, disk_bytenr,
146 disk_len: sectorsize, type: BTRFS_FILE_EXTENT_PREALLOC, compression: 0, slot);
147 slot++;
148 offset += sectorsize;
149
150 /*
151 * We want to jack up disk_bytenr a little more so the em stuff doesn't
152 * merge our records.
153 */
154 disk_bytenr += 2 * sectorsize;
155
156 /*
157 * Now for a partially written prealloc extent, basically the same as
158 * the hole punch example above. Ram_bytes never changes when you mark
159 * extents written btw.
160 */
161 insert_extent(root, start: offset, len: sectorsize, ram_bytes: 4 * sectorsize, offset: 0, disk_bytenr,
162 disk_len: 4 * sectorsize, type: BTRFS_FILE_EXTENT_PREALLOC, compression: 0, slot);
163 slot++;
164 offset += sectorsize;
165 insert_extent(root, start: offset, len: sectorsize, ram_bytes: 4 * sectorsize, offset: sectorsize,
166 disk_bytenr, disk_len: 4 * sectorsize, type: BTRFS_FILE_EXTENT_REG, compression: 0,
167 slot);
168 slot++;
169 offset += sectorsize;
170 insert_extent(root, start: offset, len: 2 * sectorsize, ram_bytes: 4 * sectorsize,
171 offset: 2 * sectorsize, disk_bytenr, disk_len: 4 * sectorsize,
172 type: BTRFS_FILE_EXTENT_PREALLOC, compression: 0, slot);
173 slot++;
174 offset += 2 * sectorsize;
175 disk_bytenr += 4 * sectorsize;
176
177 /* Now a normal compressed extent */
178 insert_extent(root, start: offset, len: 2 * sectorsize, ram_bytes: 2 * sectorsize, offset: 0,
179 disk_bytenr, disk_len: sectorsize, type: BTRFS_FILE_EXTENT_REG,
180 compression: BTRFS_COMPRESS_ZLIB, slot);
181 slot++;
182 offset += 2 * sectorsize;
183 /* No merges */
184 disk_bytenr += 2 * sectorsize;
185
186 /* Now a split compressed extent */
187 insert_extent(root, start: offset, len: sectorsize, ram_bytes: 4 * sectorsize, offset: 0, disk_bytenr,
188 disk_len: sectorsize, type: BTRFS_FILE_EXTENT_REG,
189 compression: BTRFS_COMPRESS_ZLIB, slot);
190 slot++;
191 offset += sectorsize;
192 insert_extent(root, start: offset, len: sectorsize, ram_bytes: sectorsize, offset: 0,
193 disk_bytenr: disk_bytenr + sectorsize, disk_len: sectorsize,
194 type: BTRFS_FILE_EXTENT_REG, compression: 0, slot);
195 slot++;
196 offset += sectorsize;
197 insert_extent(root, start: offset, len: 2 * sectorsize, ram_bytes: 4 * sectorsize,
198 offset: 2 * sectorsize, disk_bytenr, disk_len: sectorsize,
199 type: BTRFS_FILE_EXTENT_REG, compression: BTRFS_COMPRESS_ZLIB, slot);
200 slot++;
201 offset += 2 * sectorsize;
202 disk_bytenr += 2 * sectorsize;
203
204 /* Now extents that have a hole but no hole extent */
205 insert_extent(root, start: offset, len: sectorsize, ram_bytes: sectorsize, offset: 0, disk_bytenr,
206 disk_len: sectorsize, type: BTRFS_FILE_EXTENT_REG, compression: 0, slot);
207 slot++;
208 offset += 4 * sectorsize;
209 disk_bytenr += sectorsize;
210 insert_extent(root, start: offset, len: sectorsize, ram_bytes: sectorsize, offset: 0, disk_bytenr,
211 disk_len: sectorsize, type: BTRFS_FILE_EXTENT_REG, compression: 0, slot);
212}
213
214static u32 prealloc_only = 0;
215static u32 compressed_only = 0;
216static u32 vacancy_only = 0;
217
218static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
219{
220 struct btrfs_fs_info *fs_info = NULL;
221 struct inode *inode = NULL;
222 struct btrfs_root *root = NULL;
223 struct extent_map *em = NULL;
224 u64 orig_start;
225 u64 disk_bytenr;
226 u64 offset;
227 int ret = -ENOMEM;
228
229 test_msg("running btrfs_get_extent tests");
230
231 inode = btrfs_new_test_inode();
232 if (!inode) {
233 test_std_err(TEST_ALLOC_INODE);
234 return ret;
235 }
236
237 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
238 if (!fs_info) {
239 test_std_err(TEST_ALLOC_FS_INFO);
240 goto out;
241 }
242
243 root = btrfs_alloc_dummy_root(fs_info);
244 if (IS_ERR(ptr: root)) {
245 test_std_err(TEST_ALLOC_ROOT);
246 goto out;
247 }
248
249 root->node = alloc_dummy_extent_buffer(fs_info, start: nodesize);
250 if (!root->node) {
251 test_std_err(TEST_ALLOC_ROOT);
252 goto out;
253 }
254
255 btrfs_set_header_nritems(eb: root->node, val: 0);
256 btrfs_set_header_level(eb: root->node, val: 0);
257 ret = -EINVAL;
258
259 /* First with no extents */
260 BTRFS_I(inode)->root = root;
261 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: 0, len: sectorsize);
262 if (IS_ERR(ptr: em)) {
263 em = NULL;
264 test_err("got an error when we shouldn't have");
265 goto out;
266 }
267 if (em->disk_bytenr != EXTENT_MAP_HOLE) {
268 test_err("expected a hole, got %llu", em->disk_bytenr);
269 goto out;
270 }
271 btrfs_free_extent_map(em);
272 btrfs_drop_extent_map_range(BTRFS_I(inode), start: 0, end: (u64)-1, skip_pinned: false);
273
274 /*
275 * All of the magic numbers are based on the mapping setup in
276 * setup_file_extents, so if you change anything there you need to
277 * update the comment and update the expected values below.
278 */
279 setup_file_extents(root, sectorsize);
280
281 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: 0, len: (u64)-1);
282 if (IS_ERR(ptr: em)) {
283 test_err("got an error when we shouldn't have");
284 goto out;
285 }
286 if (em->disk_bytenr != EXTENT_MAP_INLINE) {
287 test_err("expected an inline, got %llu", em->disk_bytenr);
288 goto out;
289 }
290
291 /*
292 * For inline extent, we always round up the em to sectorsize, as
293 * they are either:
294 *
295 * a) a hidden hole
296 * The range will be zeroed at inline extent read time.
297 *
298 * b) a file extent with unaligned bytenr
299 * Tree checker will reject it.
300 */
301 if (em->start != 0 || em->len != sectorsize) {
302 test_err(
303 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
304 sectorsize, em->start, em->len);
305 goto out;
306 }
307 if (em->flags != 0) {
308 test_err("unexpected flags set, want 0 have %u", em->flags);
309 goto out;
310 }
311 /*
312 * We don't test anything else for inline since it doesn't get set
313 * unless we have a page for it to write into. Maybe we should change
314 * this?
315 */
316 offset = em->start + em->len;
317 btrfs_free_extent_map(em);
318
319 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
320 if (IS_ERR(ptr: em)) {
321 test_err("got an error when we shouldn't have");
322 goto out;
323 }
324 if (em->disk_bytenr != EXTENT_MAP_HOLE) {
325 test_err("expected a hole, got %llu", em->disk_bytenr);
326 goto out;
327 }
328 if (em->start != offset || em->len != 4) {
329 test_err(
330 "unexpected extent wanted start %llu len 4, got start %llu len %llu",
331 offset, em->start, em->len);
332 goto out;
333 }
334 if (em->flags != 0) {
335 test_err("unexpected flags set, want 0 have %u", em->flags);
336 goto out;
337 }
338 offset = em->start + em->len;
339 btrfs_free_extent_map(em);
340
341 /* Regular extent */
342 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
343 if (IS_ERR(ptr: em)) {
344 test_err("got an error when we shouldn't have");
345 goto out;
346 }
347 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
348 test_err("expected a real extent, got %llu", em->disk_bytenr);
349 goto out;
350 }
351 if (em->start != offset || em->len != sectorsize - 1) {
352 test_err(
353 "unexpected extent wanted start %llu len 4095, got start %llu len %llu",
354 offset, em->start, em->len);
355 goto out;
356 }
357 if (em->flags != 0) {
358 test_err("unexpected flags set, want 0 have %u", em->flags);
359 goto out;
360 }
361 if (em->offset != 0) {
362 test_err("wrong offset, want 0, have %llu", em->offset);
363 goto out;
364 }
365 offset = em->start + em->len;
366 btrfs_free_extent_map(em);
367
368 /* The next 3 are split extents */
369 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
370 if (IS_ERR(ptr: em)) {
371 test_err("got an error when we shouldn't have");
372 goto out;
373 }
374 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
375 test_err("expected a real extent, got %llu", em->disk_bytenr);
376 goto out;
377 }
378 if (em->start != offset || em->len != sectorsize) {
379 test_err(
380 "unexpected extent start %llu len %u, got start %llu len %llu",
381 offset, sectorsize, em->start, em->len);
382 goto out;
383 }
384 if (em->flags != 0) {
385 test_err("unexpected flags set, want 0 have %u", em->flags);
386 goto out;
387 }
388 if (em->offset != 0) {
389 test_err("wrong offset, want 0, have %llu", em->offset);
390 goto out;
391 }
392 disk_bytenr = btrfs_extent_map_block_start(em);
393 orig_start = em->start;
394 offset = em->start + em->len;
395 btrfs_free_extent_map(em);
396
397 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
398 if (IS_ERR(ptr: em)) {
399 test_err("got an error when we shouldn't have");
400 goto out;
401 }
402 if (em->disk_bytenr != EXTENT_MAP_HOLE) {
403 test_err("expected a hole, got %llu", em->disk_bytenr);
404 goto out;
405 }
406 if (em->start != offset || em->len != sectorsize) {
407 test_err(
408 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
409 offset, sectorsize, em->start, em->len);
410 goto out;
411 }
412 if (em->flags != 0) {
413 test_err("unexpected flags set, want 0 have %u", em->flags);
414 goto out;
415 }
416 offset = em->start + em->len;
417 btrfs_free_extent_map(em);
418
419 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
420 if (IS_ERR(ptr: em)) {
421 test_err("got an error when we shouldn't have");
422 goto out;
423 }
424 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
425 test_err("expected a real extent, got %llu", em->disk_bytenr);
426 goto out;
427 }
428 if (em->start != offset || em->len != 2 * sectorsize) {
429 test_err(
430 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
431 offset, 2 * sectorsize, em->start, em->len);
432 goto out;
433 }
434 if (em->flags != 0) {
435 test_err("unexpected flags set, want 0 have %u", em->flags);
436 goto out;
437 }
438 if (em->start - em->offset != orig_start) {
439 test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu",
440 em->start, em->offset, orig_start);
441 goto out;
442 }
443 disk_bytenr += (em->start - orig_start);
444 if (btrfs_extent_map_block_start(em) != disk_bytenr) {
445 test_err("wrong block start, want %llu, have %llu",
446 disk_bytenr, btrfs_extent_map_block_start(em));
447 goto out;
448 }
449 offset = em->start + em->len;
450 btrfs_free_extent_map(em);
451
452 /* Prealloc extent */
453 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
454 if (IS_ERR(ptr: em)) {
455 test_err("got an error when we shouldn't have");
456 goto out;
457 }
458 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
459 test_err("expected a real extent, got %llu", em->disk_bytenr);
460 goto out;
461 }
462 if (em->start != offset || em->len != sectorsize) {
463 test_err(
464 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
465 offset, sectorsize, em->start, em->len);
466 goto out;
467 }
468 if (em->flags != prealloc_only) {
469 test_err("unexpected flags set, want %u have %u",
470 prealloc_only, em->flags);
471 goto out;
472 }
473 if (em->offset != 0) {
474 test_err("wrong offset, want 0, have %llu", em->offset);
475 goto out;
476 }
477 offset = em->start + em->len;
478 btrfs_free_extent_map(em);
479
480 /* The next 3 are a half written prealloc extent */
481 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
482 if (IS_ERR(ptr: em)) {
483 test_err("got an error when we shouldn't have");
484 goto out;
485 }
486 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
487 test_err("expected a real extent, got %llu", em->disk_bytenr);
488 goto out;
489 }
490 if (em->start != offset || em->len != sectorsize) {
491 test_err(
492 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
493 offset, sectorsize, em->start, em->len);
494 goto out;
495 }
496 if (em->flags != prealloc_only) {
497 test_err("unexpected flags set, want %u have %u",
498 prealloc_only, em->flags);
499 goto out;
500 }
501 if (em->offset != 0) {
502 test_err("wrong offset, want 0, have %llu", em->offset);
503 goto out;
504 }
505 disk_bytenr = btrfs_extent_map_block_start(em);
506 orig_start = em->start;
507 offset = em->start + em->len;
508 btrfs_free_extent_map(em);
509
510 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
511 if (IS_ERR(ptr: em)) {
512 test_err("got an error when we shouldn't have");
513 goto out;
514 }
515 if (em->disk_bytenr >= EXTENT_MAP_HOLE) {
516 test_err("expected a real extent, got %llu", em->disk_bytenr);
517 goto out;
518 }
519 if (em->start != offset || em->len != sectorsize) {
520 test_err(
521 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
522 offset, sectorsize, em->start, em->len);
523 goto out;
524 }
525 if (em->flags != 0) {
526 test_err("unexpected flags set, want 0 have %u", em->flags);
527 goto out;
528 }
529 if (em->start - em->offset != orig_start) {
530 test_err("unexpected offset, wanted %llu, have %llu",
531 em->start - orig_start, em->offset);
532 goto out;
533 }
534 if (btrfs_extent_map_block_start(em) != disk_bytenr + em->offset) {
535 test_err("unexpected block start, wanted %llu, have %llu",
536 disk_bytenr + em->offset, btrfs_extent_map_block_start(em));
537 goto out;
538 }
539 offset = em->start + em->len;
540 btrfs_free_extent_map(em);
541
542 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
543 if (IS_ERR(ptr: em)) {
544 test_err("got an error when we shouldn't have");
545 goto out;
546 }
547 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
548 test_err("expected a real extent, got %llu", em->disk_bytenr);
549 goto out;
550 }
551 if (em->start != offset || em->len != 2 * sectorsize) {
552 test_err(
553 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
554 offset, 2 * sectorsize, em->start, em->len);
555 goto out;
556 }
557 if (em->flags != prealloc_only) {
558 test_err("unexpected flags set, want %u have %u",
559 prealloc_only, em->flags);
560 goto out;
561 }
562 if (em->start - em->offset != orig_start) {
563 test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu",
564 em->start, em->offset, orig_start);
565 goto out;
566 }
567 if (btrfs_extent_map_block_start(em) != disk_bytenr + em->offset) {
568 test_err("unexpected block start, wanted %llu, have %llu",
569 disk_bytenr + em->offset, btrfs_extent_map_block_start(em));
570 goto out;
571 }
572 offset = em->start + em->len;
573 btrfs_free_extent_map(em);
574
575 /* Now for the compressed extent */
576 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
577 if (IS_ERR(ptr: em)) {
578 test_err("got an error when we shouldn't have");
579 goto out;
580 }
581 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
582 test_err("expected a real extent, got %llu", em->disk_bytenr);
583 goto out;
584 }
585 if (em->start != offset || em->len != 2 * sectorsize) {
586 test_err(
587 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
588 offset, 2 * sectorsize, em->start, em->len);
589 goto out;
590 }
591 if (em->flags != compressed_only) {
592 test_err("unexpected flags set, want %u have %u",
593 compressed_only, em->flags);
594 goto out;
595 }
596 if (em->offset != 0) {
597 test_err("wrong offset, want 0, have %llu", em->offset);
598 goto out;
599 }
600 if (btrfs_extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
601 test_err("unexpected compress type, wanted %d, got %d",
602 BTRFS_COMPRESS_ZLIB, btrfs_extent_map_compression(em));
603 goto out;
604 }
605 offset = em->start + em->len;
606 btrfs_free_extent_map(em);
607
608 /* Split compressed extent */
609 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
610 if (IS_ERR(ptr: em)) {
611 test_err("got an error when we shouldn't have");
612 goto out;
613 }
614 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
615 test_err("expected a real extent, got %llu", em->disk_bytenr);
616 goto out;
617 }
618 if (em->start != offset || em->len != sectorsize) {
619 test_err(
620 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
621 offset, sectorsize, em->start, em->len);
622 goto out;
623 }
624 if (em->flags != compressed_only) {
625 test_err("unexpected flags set, want %u have %u",
626 compressed_only, em->flags);
627 goto out;
628 }
629 if (em->offset != 0) {
630 test_err("wrong offset, want 0, have %llu", em->offset);
631 goto out;
632 }
633 if (btrfs_extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
634 test_err("unexpected compress type, wanted %d, got %d",
635 BTRFS_COMPRESS_ZLIB, btrfs_extent_map_compression(em));
636 goto out;
637 }
638 disk_bytenr = btrfs_extent_map_block_start(em);
639 orig_start = em->start;
640 offset = em->start + em->len;
641 btrfs_free_extent_map(em);
642
643 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
644 if (IS_ERR(ptr: em)) {
645 test_err("got an error when we shouldn't have");
646 goto out;
647 }
648 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
649 test_err("expected a real extent, got %llu", em->disk_bytenr);
650 goto out;
651 }
652 if (em->start != offset || em->len != sectorsize) {
653 test_err(
654 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
655 offset, sectorsize, em->start, em->len);
656 goto out;
657 }
658 if (em->flags != 0) {
659 test_err("unexpected flags set, want 0 have %u", em->flags);
660 goto out;
661 }
662 if (em->offset != 0) {
663 test_err("wrong offset, want 0, have %llu", em->offset);
664 goto out;
665 }
666 offset = em->start + em->len;
667 btrfs_free_extent_map(em);
668
669 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
670 if (IS_ERR(ptr: em)) {
671 test_err("got an error when we shouldn't have");
672 goto out;
673 }
674 if (btrfs_extent_map_block_start(em) != disk_bytenr) {
675 test_err("block start does not match, want %llu got %llu",
676 disk_bytenr, btrfs_extent_map_block_start(em));
677 goto out;
678 }
679 if (em->start != offset || em->len != 2 * sectorsize) {
680 test_err(
681 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
682 offset, 2 * sectorsize, em->start, em->len);
683 goto out;
684 }
685 if (em->flags != compressed_only) {
686 test_err("unexpected flags set, want %u have %u",
687 compressed_only, em->flags);
688 goto out;
689 }
690 if (em->start - em->offset != orig_start) {
691 test_err("wrong offset, em->start=%llu em->offset=%llu orig_start=%llu",
692 em->start, em->offset, orig_start);
693 goto out;
694 }
695 if (btrfs_extent_map_compression(em) != BTRFS_COMPRESS_ZLIB) {
696 test_err("unexpected compress type, wanted %d, got %d",
697 BTRFS_COMPRESS_ZLIB, btrfs_extent_map_compression(em));
698 goto out;
699 }
700 offset = em->start + em->len;
701 btrfs_free_extent_map(em);
702
703 /* A hole between regular extents but no hole extent */
704 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset + 6, len: sectorsize);
705 if (IS_ERR(ptr: em)) {
706 test_err("got an error when we shouldn't have");
707 goto out;
708 }
709 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
710 test_err("expected a real extent, got %llu", em->disk_bytenr);
711 goto out;
712 }
713 if (em->start != offset || em->len != sectorsize) {
714 test_err(
715 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
716 offset, sectorsize, em->start, em->len);
717 goto out;
718 }
719 if (em->flags != 0) {
720 test_err("unexpected flags set, want 0 have %u", em->flags);
721 goto out;
722 }
723 if (em->offset != 0) {
724 test_err("wrong offset, want 0, have %llu", em->offset);
725 goto out;
726 }
727 offset = em->start + em->len;
728 btrfs_free_extent_map(em);
729
730 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, SZ_4M);
731 if (IS_ERR(ptr: em)) {
732 test_err("got an error when we shouldn't have");
733 goto out;
734 }
735 if (em->disk_bytenr != EXTENT_MAP_HOLE) {
736 test_err("expected a hole extent, got %llu", em->disk_bytenr);
737 goto out;
738 }
739 /*
740 * Currently we just return a length that we requested rather than the
741 * length of the actual hole, if this changes we'll have to change this
742 * test.
743 */
744 if (em->start != offset || em->len != 3 * sectorsize) {
745 test_err(
746 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
747 offset, 3 * sectorsize, em->start, em->len);
748 goto out;
749 }
750 if (em->flags != vacancy_only) {
751 test_err("unexpected flags set, want %u have %u",
752 vacancy_only, em->flags);
753 goto out;
754 }
755 if (em->offset != 0) {
756 test_err("wrong offset, want 0, have %llu", em->offset);
757 goto out;
758 }
759 offset = em->start + em->len;
760 btrfs_free_extent_map(em);
761
762 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: offset, len: sectorsize);
763 if (IS_ERR(ptr: em)) {
764 test_err("got an error when we shouldn't have");
765 goto out;
766 }
767 if (em->disk_bytenr >= EXTENT_MAP_LAST_BYTE) {
768 test_err("expected a real extent, got %llu", em->disk_bytenr);
769 goto out;
770 }
771 if (em->start != offset || em->len != sectorsize) {
772 test_err(
773 "unexpected extent wanted start %llu len %u, got start %llu len %llu",
774 offset, sectorsize, em->start, em->len);
775 goto out;
776 }
777 if (em->flags != 0) {
778 test_err("unexpected flags set, want 0 have %u", em->flags);
779 goto out;
780 }
781 if (em->offset != 0) {
782 test_err("wrong orig offset, want 0, have %llu", em->offset);
783 goto out;
784 }
785 ret = 0;
786out:
787 if (!IS_ERR(ptr: em))
788 btrfs_free_extent_map(em);
789 iput(inode);
790 btrfs_free_dummy_root(root);
791 btrfs_free_dummy_fs_info(fs_info);
792 return ret;
793}
794
795static int test_hole_first(u32 sectorsize, u32 nodesize)
796{
797 struct btrfs_fs_info *fs_info = NULL;
798 struct inode *inode = NULL;
799 struct btrfs_root *root = NULL;
800 struct extent_map *em = NULL;
801 int ret = -ENOMEM;
802
803 test_msg("running hole first btrfs_get_extent test");
804
805 inode = btrfs_new_test_inode();
806 if (!inode) {
807 test_std_err(TEST_ALLOC_INODE);
808 return ret;
809 }
810
811 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
812 if (!fs_info) {
813 test_std_err(TEST_ALLOC_FS_INFO);
814 goto out;
815 }
816
817 root = btrfs_alloc_dummy_root(fs_info);
818 if (IS_ERR(ptr: root)) {
819 test_std_err(TEST_ALLOC_ROOT);
820 goto out;
821 }
822
823 root->node = alloc_dummy_extent_buffer(fs_info, start: nodesize);
824 if (!root->node) {
825 test_std_err(TEST_ALLOC_ROOT);
826 goto out;
827 }
828
829 btrfs_set_header_nritems(eb: root->node, val: 0);
830 btrfs_set_header_level(eb: root->node, val: 0);
831 BTRFS_I(inode)->root = root;
832 ret = -EINVAL;
833
834 /*
835 * Need a blank inode item here just so we don't confuse
836 * btrfs_get_extent.
837 */
838 insert_inode_item_key(root);
839 insert_extent(root, start: sectorsize, len: sectorsize, ram_bytes: sectorsize, offset: 0, disk_bytenr: sectorsize,
840 disk_len: sectorsize, type: BTRFS_FILE_EXTENT_REG, compression: 0, slot: 1);
841 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: 0, len: 2 * sectorsize);
842 if (IS_ERR(ptr: em)) {
843 test_err("got an error when we shouldn't have");
844 goto out;
845 }
846 if (em->disk_bytenr != EXTENT_MAP_HOLE) {
847 test_err("expected a hole, got %llu", em->disk_bytenr);
848 goto out;
849 }
850 if (em->start != 0 || em->len != sectorsize) {
851 test_err(
852 "unexpected extent wanted start 0 len %u, got start %llu len %llu",
853 sectorsize, em->start, em->len);
854 goto out;
855 }
856 if (em->flags != vacancy_only) {
857 test_err("wrong flags, wanted %u, have %u", vacancy_only,
858 em->flags);
859 goto out;
860 }
861 btrfs_free_extent_map(em);
862
863 em = btrfs_get_extent(BTRFS_I(inode), NULL, start: sectorsize, len: 2 * sectorsize);
864 if (IS_ERR(ptr: em)) {
865 test_err("got an error when we shouldn't have");
866 goto out;
867 }
868 if (btrfs_extent_map_block_start(em) != sectorsize) {
869 test_err("expected a real extent, got %llu",
870 btrfs_extent_map_block_start(em));
871 goto out;
872 }
873 if (em->start != sectorsize || em->len != sectorsize) {
874 test_err(
875 "unexpected extent wanted start %u len %u, got start %llu len %llu",
876 sectorsize, sectorsize, em->start, em->len);
877 goto out;
878 }
879 if (em->flags != 0) {
880 test_err("unexpected flags set, wanted 0 got %u",
881 em->flags);
882 goto out;
883 }
884 ret = 0;
885out:
886 if (!IS_ERR(ptr: em))
887 btrfs_free_extent_map(em);
888 iput(inode);
889 btrfs_free_dummy_root(root);
890 btrfs_free_dummy_fs_info(fs_info);
891 return ret;
892}
893
894static int test_extent_accounting(u32 sectorsize, u32 nodesize)
895{
896 struct btrfs_fs_info *fs_info = NULL;
897 struct inode *inode = NULL;
898 struct btrfs_root *root = NULL;
899 int ret = -ENOMEM;
900
901 test_msg("running outstanding_extents tests");
902
903 inode = btrfs_new_test_inode();
904 if (!inode) {
905 test_std_err(TEST_ALLOC_INODE);
906 return ret;
907 }
908
909 fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
910 if (!fs_info) {
911 test_std_err(TEST_ALLOC_FS_INFO);
912 goto out;
913 }
914
915 root = btrfs_alloc_dummy_root(fs_info);
916 if (IS_ERR(ptr: root)) {
917 test_std_err(TEST_ALLOC_ROOT);
918 goto out;
919 }
920
921 BTRFS_I(inode)->root = root;
922
923 /* [BTRFS_MAX_EXTENT_SIZE] */
924 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), start: 0,
925 BTRFS_MAX_EXTENT_SIZE - 1, extra_bits: 0, NULL);
926 if (ret) {
927 test_err("btrfs_set_extent_delalloc returned %d", ret);
928 goto out;
929 }
930 if (BTRFS_I(inode)->outstanding_extents != 1) {
931 ret = -EINVAL;
932 test_err("miscount, wanted 1, got %u",
933 BTRFS_I(inode)->outstanding_extents);
934 goto out;
935 }
936
937 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
938 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE,
939 BTRFS_MAX_EXTENT_SIZE + sectorsize - 1,
940 extra_bits: 0, NULL);
941 if (ret) {
942 test_err("btrfs_set_extent_delalloc returned %d", ret);
943 goto out;
944 }
945 if (BTRFS_I(inode)->outstanding_extents != 2) {
946 ret = -EINVAL;
947 test_err("miscount, wanted 2, got %u",
948 BTRFS_I(inode)->outstanding_extents);
949 goto out;
950 }
951
952 /* [BTRFS_MAX_EXTENT_SIZE/2][sectorsize HOLE][the rest] */
953 ret = btrfs_clear_extent_bit(tree: &BTRFS_I(inode)->io_tree,
954 BTRFS_MAX_EXTENT_SIZE >> 1,
955 end: (BTRFS_MAX_EXTENT_SIZE >> 1) + sectorsize - 1,
956 bits: EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL);
957 if (ret) {
958 test_err("clear_extent_bit returned %d", ret);
959 goto out;
960 }
961 if (BTRFS_I(inode)->outstanding_extents != 2) {
962 ret = -EINVAL;
963 test_err("miscount, wanted 2, got %u",
964 BTRFS_I(inode)->outstanding_extents);
965 goto out;
966 }
967
968 /* [BTRFS_MAX_EXTENT_SIZE][sectorsize] */
969 ret = btrfs_set_extent_delalloc(BTRFS_I(inode), BTRFS_MAX_EXTENT_SIZE >> 1,
970 end: (BTRFS_MAX_EXTENT_SIZE >> 1)
971 + sectorsize - 1,
972 extra_bits: 0, NULL);
973 if (ret) {
974 test_err("btrfs_set_extent_delalloc returned %d", ret);
975 goto out;
976 }
977 if (BTRFS_I(inode)->outstanding_extents != 2) {
978 ret = -EINVAL;
979 test_err("miscount, wanted 2, got %u",
980 BTRFS_I(inode)->outstanding_extents);
981 goto out;
982 }
983
984 /*
985 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize HOLE][BTRFS_MAX_EXTENT_SIZE+sectorsize]
986 */
987 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
988 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize,
989 end: (BTRFS_MAX_EXTENT_SIZE << 1) + 3 * sectorsize - 1,
990 extra_bits: 0, NULL);
991 if (ret) {
992 test_err("btrfs_set_extent_delalloc returned %d", ret);
993 goto out;
994 }
995 if (BTRFS_I(inode)->outstanding_extents != 4) {
996 ret = -EINVAL;
997 test_err("miscount, wanted 4, got %u",
998 BTRFS_I(inode)->outstanding_extents);
999 goto out;
1000 }
1001
1002 /*
1003 * [BTRFS_MAX_EXTENT_SIZE+sectorsize][sectorsize][BTRFS_MAX_EXTENT_SIZE+sectorsize]
1004 */
1005 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1006 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1007 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, extra_bits: 0, NULL);
1008 if (ret) {
1009 test_err("btrfs_set_extent_delalloc returned %d", ret);
1010 goto out;
1011 }
1012 if (BTRFS_I(inode)->outstanding_extents != 3) {
1013 ret = -EINVAL;
1014 test_err("miscount, wanted 3, got %u",
1015 BTRFS_I(inode)->outstanding_extents);
1016 goto out;
1017 }
1018
1019 /* [BTRFS_MAX_EXTENT_SIZE+4k][4K HOLE][BTRFS_MAX_EXTENT_SIZE+4k] */
1020 ret = btrfs_clear_extent_bit(tree: &BTRFS_I(inode)->io_tree,
1021 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1022 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1,
1023 bits: EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL);
1024 if (ret) {
1025 test_err("clear_extent_bit returned %d", ret);
1026 goto out;
1027 }
1028 if (BTRFS_I(inode)->outstanding_extents != 4) {
1029 ret = -EINVAL;
1030 test_err("miscount, wanted 4, got %u",
1031 BTRFS_I(inode)->outstanding_extents);
1032 goto out;
1033 }
1034
1035 /*
1036 * Refill the hole again just for good measure, because I thought it
1037 * might fail and I'd rather satisfy my paranoia at this point.
1038 */
1039 ret = btrfs_set_extent_delalloc(BTRFS_I(inode),
1040 BTRFS_MAX_EXTENT_SIZE + sectorsize,
1041 BTRFS_MAX_EXTENT_SIZE + 2 * sectorsize - 1, extra_bits: 0, NULL);
1042 if (ret) {
1043 test_err("btrfs_set_extent_delalloc returned %d", ret);
1044 goto out;
1045 }
1046 if (BTRFS_I(inode)->outstanding_extents != 3) {
1047 ret = -EINVAL;
1048 test_err("miscount, wanted 3, got %u",
1049 BTRFS_I(inode)->outstanding_extents);
1050 goto out;
1051 }
1052
1053 /* Empty */
1054 ret = btrfs_clear_extent_bit(tree: &BTRFS_I(inode)->io_tree, start: 0, end: (u64)-1,
1055 bits: EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL);
1056 if (ret) {
1057 test_err("clear_extent_bit returned %d", ret);
1058 goto out;
1059 }
1060 if (BTRFS_I(inode)->outstanding_extents) {
1061 ret = -EINVAL;
1062 test_err("miscount, wanted 0, got %u",
1063 BTRFS_I(inode)->outstanding_extents);
1064 goto out;
1065 }
1066 ret = 0;
1067out:
1068 if (ret)
1069 btrfs_clear_extent_bit(tree: &BTRFS_I(inode)->io_tree, start: 0, end: (u64)-1,
1070 bits: EXTENT_DELALLOC | EXTENT_DELALLOC_NEW, NULL);
1071 iput(inode);
1072 btrfs_free_dummy_root(root);
1073 btrfs_free_dummy_fs_info(fs_info);
1074 return ret;
1075}
1076
1077int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
1078{
1079 int ret;
1080
1081 test_msg("running inode tests");
1082
1083 compressed_only |= EXTENT_FLAG_COMPRESS_ZLIB;
1084 prealloc_only |= EXTENT_FLAG_PREALLOC;
1085
1086 ret = test_btrfs_get_extent(sectorsize, nodesize);
1087 if (ret)
1088 return ret;
1089 ret = test_hole_first(sectorsize, nodesize);
1090 if (ret)
1091 return ret;
1092 return test_extent_accounting(sectorsize, nodesize);
1093}
1094

source code of linux/fs/btrfs/tests/inode-tests.c